Mold-aligning means



June 11, 1929. 9. LAST 1.717.109

MOLD ALIGNING MEANS Filed Jan. '7, 1927 yam w 5513 attoznugs I M (CM Patented June 11, 1929.

UNITED STATES JAMES LAST, OF WALLINGTON, ENGLAND.

MOLD-ALIGNING MEANS.

Application filed January 7, 1927, Serial No. 159,586, and in Great Britain November 22, 1926.

This invention relates to plate molding, its object being to obviate the necessity for the provision of means for insuring accurate alignment or registration of the mold boxes or of the boxes and plates while providing both for accurate alignment or registration of the mold sections on reassembly of the mold after the removal of the pattern and for the prevention of accidental displacement of the sections after re-assembly.

To this end, the invention consists in the novel features and combinations hereinafter described and claimed and in order that it may be clearly understood and readily carried into practice reference will now be made to the accompanying drawings wherein several ways of carrying the same into practice are illustrated by way of example, Figures 1 to 8 being part sectional elevations illustrat ing different stages in the formation of a mold, Fig. 4 a perspective view illustrating the complementary members employed in the construction illustrated by Figs. l'to 3 and Figs. 5 and 6 perspective views illustrating modified forms of complementary members.

Referring first to Fig. 1, where 1 represents a plate pattern and 2 a mold box, the plate pattern 1 is, in accordance with the present invention, provided with suitably spaced cylindrical holes in which are located members 4 of sets of complementary members, one of which is illustrated by Fig. 4. Each of the members 4 consists of a disc-like portion 5 having peripheral grooves 6 therein and a spigot portion 7, of such diameter as to fit easily within one of the holes 3, having a recess 8 therein.

l/Vhen the members 4 are located in the holes 8, molding sand 22 is rammed into the box 2 in the usual manner and when the sand has set, the whole is inverted, as illustrated by Fig. 2.

Cylindrical intermediate members 9 (Figs. 2 and 4) of the same diameter as the spigots 7 of the members 4, having spigots 10 thereon which fit neatly within the recesses 8, are then positioned within the holes 3 with the s )igots 10 in the recesses 8, and members 11 0 disclike formation provided with peripheral grooves 12 and recess 13 of such diameter as to fit neatly over the intermediate members 9 are fitted over the portions of the latter which project above the plate 1. A molding box 14 is then positioned on the plate 1 and sand 23 rammed thereinto in the usual manner. It

will be noted that the members 4 and 11 each have a ledge portion adapted to engage the plate around the said hole in a manner preyenting molding sand from entering the hole in the molding or sand ramming operations.

It will be noted that the aligning means 9 has opposed surfaces parallel with the axis of alinement and engageable with the opposed walls of the recess 13. It will be obvious that by this construction the two members 4 and 11 may be freely used with plates 1 of different thicknesses.

lVhen the sand has set the boxes 2 and 14. with the mold sections therein, are separated and the pattern 1 and intermediate members 9 are removed, the members 4 and 11 being retained in their respective mold sections by reason of the interengagement of the latter with the peripheral grooves 6 and 12 in the former. The operation of freeing the pattern from the mold sections, prior to separating and removing the pattern, is ordinarily accomplished by vibrating the plate by means of a vibrator applied thereto in the well known manner. The plate pattern is thereby entirely freed from the mold sections and, due to the clearance of the members 9 and spigots 7 in the holes 3 in the plate, this vibrating operation is performed without affecting the members 4 and 11. It is of course obvious that except for this clearance, which is clearly apparent in Fig. 2, the members 4 and 11 would be so loosened and displaced in the vibrating operation as to be useless in thereafter alining the two mold sections. Finally, the mold is re-assembled as illustrated by Fig. 3, the accurate re-alignment or registration of the sections being insured by the engagement of the spigot portions 7 of the members 4 With the recesses 13 in the members 11.

It will be noted that the spigot portions 7 and 10 and the cylindrical portion 9 are tapered or backed off slightly to facilitate their entry into the holes 3 and recesses 13 and 8.

If the molding boxes are of the detachable type, they can be removed and replaced by pouring jackets without in any way affecting the alignment of the molds, as this is independent of the boxes.

It will be understood that the complementary aligning members may take any suitable form without exceeding the limits of the invention. For instance, as illustrated by Fig. 5, the members 4 and 11 may be of identical disc-like formation grooved peripherally, as

indicated at 6 and 12 and provided with pairs of diametrically opposite dowels 15 and holes 16, the diameters on which such dowels and holes are located making an angle of 90 one with the other, while the intermediate member 9 may be of simple disc-like formation, preferably of the same thickness as the plate 1 and provided with four holes 17 corresponding in location with that of the dowels and holes of either of the discs 4 and 11.

Again as illustrated by Fig. 6, the members 4e and 11 may be identical. and of rectangular prismoidal formation grooved at 6 and 12, before. Here, however, each is provided with a dowel 18 and hole 19 and two intermediate members 9 are provided, these also being of identical construction, each having a hole 20 therein and a dowel 21 thereon. Here again the intermediate members are preferably of the same thickness as the plate 1. With this construction, unless the mold is of great size, only one set of complementary members is necessary to insure the accurate re-alignment of the sections.

The manner in which the complementary aligning members illustrated by Figs. 5 and.

(3 are employedrwillbe obvious from. the drawings and from the description of Figs. 1 to 4, so that further description is deemed unnecessary. It will be noted, however, that the dowels 15, 18 and 21 are recessed or re lieved. This is to facilitate their entry into.

the holes corresponding therewith, should sand or other obstruction tend-to block the latter. 7

It will be understood that the constructions herein described are by way of example only and that they may be modified considerably without exceeding the limits of the invention defined by the succeeding claims.

Claims:

1. The method of forming a mold by the employmentof a pattern plate, consisting of molding into one of the mold sections at one side of the pattern plate one of two complementary members, thereafter locating the second. complementary member at the other side of the pattern plate relative to the said first member by the agency of intermediate alining means passing freely through a hole in. the plate, and molding the other mold section about the said second member while it is thus located, the said complementary members being thereby so located in the mold sections that when the pattern plate is removed the mold sections may be assembled into accurate alinement by engaging the said members, and the alining means and complementary members being so free of the plate in the said hole that vibration of the plate to loosen the pattern will not loosen the said members.

2. Mold alining means comprising a pair of complementary members adapted to be molded into the two cooperating sections of a mold, and means for alining one of said members, before the molding thereof into its section, with the other member, after it has been molded into its section, through a hole in the pattern plate, each of said members having a ledge portion of greater diameter than the said means and adapted to engage the plate around the said hole in a manner preventing molding sand from entering the hole in the molding operation.

3. Mold alining means comprising a pair of complementary members adapted to be molded into the two cooperating sections of mold, and means having opposed engage able surfaces parallel to the axis of alinement for engaging and alining one of said members, before the molding thereof into its section, with the other member, after it has been molded into its section, through a hole in the pattern plate, each of said members having a ledge portion of greater diameter than the said means and adapted to engage the plate around the said hole in a manner preventing molding sand from entering the hole in the molding operation.

at. In combination, a plate pattern having a hole therein, and a set of inter-engaging complementary members consisting of two outer members each of a diameter greater greater than that of the hole in the plate pattern and an inner member of a diameter less than that of the hole in the plate pattern, the outer members being capable of engagement both with the inner member and with one another.

5. In combination, a plate pattern having a hole therein, and a set of-interengaging complementary members consisting of two outer members and an inner member, the outer members being capable of engagement both with the inner member and with one another and of such dimensions that they cannot be inserted in the hole in the plate pattern, while the inner member constitutes a loose fit within the hole in, the plate pattern.

6. In combination, a plate pattern having a hole therein, a member incapable of inser-- tion in the hole in the plate pattern having thereon a hollow spigot adapted to fit loosely within the hole in the plate pattern, a second member of the same diameter as the spigot on the first mentioned member and having a spigot thereon adapted to iit with in the hollow spigot of said first mentioned member, and a third member also incapable of insertion in the hole in the plate pattern having therein a socket of such diameter as to receive the body of the second mentioned member or the spigot on the first mentioned member.

7. For use in the preparation of a mold for casting, a set of complementary members comprising a disc-like member with alternate depressions and elevations on its outer having alternate depressions and elevations on its outer surface and a socket. therein of such diameter as to receive the body of the second mentioned member or the spigot 10 on the first mentioned member.

In testimony whereof I afiix my signature.

JAMES LAST. 

